﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Net;
using System.IO;
using System.Net.Cache;

namespace WebTools
{
    public partial class HttpTest : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            Encoding myEncoding = Encoding.UTF8;
            //if(modPOST.fo
            string sMode = RadioButtonList1.SelectedValue;
            string sUrl = txtUrl.Value;
            string sPostData = txtPostData.Text;
            string sContentType = "application/x-www-form-urlencoded";
            HttpWebRequest req;

            // == main ==
            OutLog(string.Format("{2}: {0} {1}", sMode, sUrl, DateTime.Now.ToString("g")));
            try
            {
                // init
                req = HttpWebRequest.Create(sUrl) as HttpWebRequest;
                req.Method = sMode;
                req.Accept = "*/*";
                req.KeepAlive = false;
                req.CachePolicy = new HttpRequestCachePolicy(HttpRequestCacheLevel.NoCacheNoStore);
                string strHeaders = txbHeaders.Text + "&";
                string[] headers = strHeaders.Split('&');
                if (headers.Length > 0)
                {
                    foreach (string sHeaders in headers)
                    {
                        if (sHeaders.Contains("="))
                        {
                            req.Headers.Add(sHeaders.Substring(0, sHeaders.IndexOf("=")), sHeaders.Substring(sHeaders.IndexOf("=") + 1));
                        }
                    }
                }
                if (0 == string.Compare("POST", sMode))
                {
                    byte[] bufPost = myEncoding.GetBytes(sPostData);
                    req.ContentType = sContentType;
                    req.ContentLength = bufPost.Length;
                    Stream newStream = req.GetRequestStream();
                    newStream.Write(bufPost, 0, bufPost.Length);
                    newStream.Close();
                }

                // Response
                HttpWebResponse res = req.GetResponse() as HttpWebResponse;
                try
                {
                    OutLog("Response.ContentLength:\t{0}", res.ContentLength);
                    OutLog("Response.ContentType:\t{0}", res.ContentType);
                    OutLog("Response.CharacterSet:\t{0}", res.CharacterSet);
                    OutLog("Response.ContentEncoding:\t{0}", res.ContentEncoding);
                    OutLog("Response.IsFromCache:\t{0}", res.IsFromCache);
                    OutLog("Response.IsMutuallyAuthenticated:\t{0}", res.IsMutuallyAuthenticated);
                    OutLog("Response.LastModified:\t{0}", res.LastModified);
                    OutLog("Response.Method:\t{0}", res.Method);
                    OutLog("Response.ProtocolVersion:\t{0}", res.ProtocolVersion);
                    OutLog("Response.ResponseUri:\t{0}", res.ResponseUri);
                    OutLog("Response.Server:\t{0}", res.Server);
                    OutLog("Response.StatusCode:\t{0}\t# {1}", res.StatusCode, (int)res.StatusCode);
                    OutLog("Response.StatusDescription:\t{0}", res.StatusDescription);

                    // header
                    OutLog(".\t#Header:");	// 头.
                    for (int i = 0; i < res.Headers.Count; ++i)
                    {
                        OutLog("[{2}] {0}:\t{1}", res.Headers.Keys[i], res.Headers[i], i);
                    }

                    // 找到合适的编码
                    Encoding encoding = null;
                    //encoding = Encoding_FromBodyName(res.CharacterSet);	// 后来发现主体部分的字符集与Response.CharacterSet不同.
                    //if (null == encoding) encoding = myEncoding;
                    encoding = myEncoding;
                    System.Diagnostics.Debug.WriteLine(encoding);

                    // body
                    OutLog(".\t#Body:");	// 主体.
                    using (Stream resStream = res.GetResponseStream())
                    {
                        using (StreamReader resStreamReader = new StreamReader(resStream, encoding))
                        {
                            OutLog(resStreamReader.ReadToEnd());
                        }
                    }
                    OutLog(".\t#OK.");	// 成功.
                }
                finally
                {
                    res.Close();
                }
            }
            catch (Exception ex)
            {
                txtLog.Text = sb.ToString();
                OutLog(ex.ToString());
            }
            OutLog(string.Empty);

            txtLog.Text = sb.ToString();
        }
        StringBuilder sb = new StringBuilder();
        /// <summary>
        /// 输出日志文本.
        /// </summary>
        /// <param name="s">日志文本</param>
        private void OutLog(string s)
        {
            sb.Append(s + Environment.NewLine);
        }
        private void OutLog(string format, params object[] args)
        {
            OutLog(string.Format(format, args));
        }
    }
}